Yes, it may seem futuristic, but the immersive world of virtual reality is already available right through your smartphone. Whether your phone runs iOS or Android, you can explore amazing new virtual worlds today — all you need is a cardboard viewer. It's that simple. To help get you started, we're sharing some of our favorite new VR apps on Medium. And yes — they're all free. Have any favorite VR apps? Let us know by leaving a comment below or tweeting us @DODOsays.